CN102297075A

CN102297075A - Wind turbine blade with improved bond lines

Info

Publication number: CN102297075A
Application number: CN2011101865927A
Authority: CN
Inventors: R·A·迪克松
Original assignee: General Electric Co
Current assignee: LM Wind Power AS
Priority date: 2010-06-25
Filing date: 2011-06-24
Publication date: 2011-12-28
Anticipated expiration: 2031-06-24
Also published as: DE102011051325A1; US8262364B2; US7988422B2; CN102297075B; DK178637B1; DE102011051325B4; US20110318190A1; DK201170323A; US20110142674A1

Abstract

The invention refers to a wind turbine blade with improved bond lines. In particular, a wind turbine blade (16) includes an upper shell member (20) and a lower shell member (22) defining an internal cavity (25) therebetween. The shell members are joined with a bond paste (34) along bond lines (36,37) at the leading edge (24) and trailing edge (26) of the blade. A seal member (32) is disposed between the upper and lower shell members at a designed width (38,39) of the bond line along at least one of the trailing or leading edges. The seal member has a configuration such that excess towable bond paste (34) is prevented from migrating past the seal member and into the internal cavity upon mating the upper and lower shell members in assembly of the blade.

Description

Wind turbine blade with improved connecting thread

Technical field

The present invention relates generally to wind turbines, and relates more specifically to have along the turbine bucket of the improvement Sealing of leading edge or trailing edge connecting thread (or linking seam, bonding line).

Background technique

Turbine bucket is the primary component that is used for wind energy transformation is become the wind turbine of electric energy.Blade has the cross section profile of aerofoil profile part, so that during operation, air flows on blade, thereby produces pressure reduction between the side.As a result, act on the blade from lift on the pressure side towards the suction side.Lift produces torque on main rotor shaft, this main rotor shaft is connected in the gear mode and is used for generating on the generator.

Turbine bucket is made of last (suction side) housing and following (on the pressure side) housing usually, and this upper shell and lower shell body link together at the connecting thread place along trailing edge and leading edge.Connecting thread forms by apply suitable binding slurry (paste) or compound with the design link width of minimum along connecting thread between housing parts usually.Yet the binding slurry is easy to fully flow through the design link width and enters in the inner vanes cavity.This too much binding slurry can add to sizable weight on the blade, and therefore influences the blade efficiency and the overall performance of wind turbine unfriendly.

Therefore, the industry will be benefited from a kind of improved connecting thread structure, and it has reduced the total amount that flow to the too much binding slurry in the blade cavity.

Summary of the invention

Aspects and advantages of the present invention will be in the following description partly set forth, or can be according to this explanation and clear, maybe can understand by implementing the present invention.

According to aspects of the present invention, provide a kind of wind turbine blade, it has internal cavity is defined in therebetween top shell component and bottom shell component.The binding slurry that the housing parts utilization applies with flowable form along the connecting thread at the leading edge of blade and trailing edge place and connecting.Along in trailing edge or the leading edge at least one, sealed member is arranged between top shell component and the bottom shell component with the design link width along connecting thread.Sealed member has certain structure when matching in the blade assembling with convenient upper shell and lower shell body, prevents that too much flowed binding slurry from flowing through sealed member and enter in the internal cavity.In a particular embodiment, sealed member is along leading edge connecting thread and trailing edge connecting thread and provide.

Sealed member can be by various types of materials or combination of materials and is formed, and in certain embodiments, for the binding slurry that can flow is impermeable, but can see through air, make any air be trapped in the connecting thread all can when upper shell and lower shell body force together, flow through sealed member.

In certain embodiments, sealed member can be or a combination of blocking (dam) parts or blocking parts on both that is attached in top shell component or the bottom shell component.In unique especially embodiment, block parts and can be brush seal.Sealed member can be any the single parts that block that extend towards another respective housings parts from top shell component or bottom shell component.As alternative, block parts and can be provided in top shell component and the bottom shell component each, wherein, dam cooperatively interacts in one embodiment and (or interweaves, intermesh), or overlap in another embodiment.

In another embodiment, sealed member can be a plurality of staggered parts that block, and these block parts and are defined for to flow and link the zigzag channel of slurry.

Blade also can be included in the tail end seal clearance relative with sealed member of leading edge or trailing edge, and wherein, the sealing gap provides opening, and too much flowed binding slurry flows out connecting thread via this opening in the blade assembling.

The present invention also comprises the wind turbine with one or more turbine buckets, and this blade structure becomes to have unique connecting thread structure as herein described.

With reference to following explanation and claims, these and other feature of the present invention, aspect and advantage will be better understood.Incorporate in this specification and constitute its a part of accompanying drawing showing embodiments of the invention into, and be used from elaboration principle of the present invention in conjunction with explanation one.

Description of drawings

In reference the description of the drawings book, illustrated the disclosure that the complete sum that the present invention includes its optimal mode can be implemented at those of ordinary skill of the present invention, in the accompanying drawings:

Fig. 1 is the perspective view of conventional wind turbine;

Fig. 2 is wind turbine blade embodiment's according to aspects of the present invention a perspective view;

Fig. 3 is the cross sectional view of exemplary wind turbine blade according to aspects of the present invention;

Fig. 4 is sealed member embodiment's a end elevation;

Fig. 5 is the side sectional view of leading edge connecting thread structure;

Fig. 6 is the view of the structure of the leading edge connecting thread among Fig. 5 with sealed member according to aspects of the present invention;

Fig. 7 is the sealed member embodiment's at wind turbine blade leading edge place a side sectional view;

Fig. 8 is the side sectional view of the sealed member alternative at wind turbine blade leading edge place;

Fig. 9 is the another embodiment's of sealed member at wind turbine blade leading edge place a side sectional view;

Figure 10 is another embodiment's of sealed member at the unassembled leading edge place of wind turbine blade a side sectional view;

Figure 11 is the assembled view of the embodiment among Figure 10;

Figure 12 is the side sectional view of the connecting thread structure at wind turbine blade trailing edge place;

The side sectional view that Figure 13 constructs for the connecting thread at the trailing edge place with sealed member according to aspects of the present invention; And

Figure 14 is the side sectional view of the alternative sealed member structure at trailing edge connecting thread place.

List of parts

10 wind turbines

12 pylons

14 cabins

16 blades

18 rotor hub

20 top shell component

21 plane of inclination

22 bottom shell component

23 front ends

24 leading edges

25 internal cavities

26 trailing edges

28 root portion

30 tip parts

32 sealed members

34 link slurry

35 too much binding slurries

36 connecting threads

37 connecting threads

38 connecting threads design width

39 connecting threads design width

40 connecting thread thickness

44 block parts

46 seal clearances

48 brush seals

Embodiment

Now will be at length with reference to embodiments of the invention, one or more example is shown in the drawings.Each example all provides to explain mode of the present invention, and also unrestricted the present invention.In fact, those of ordinary skill in the art will be clear that, do not depart from the scope of the present invention or the situation of spirit under, can make various modifications and variations in the present invention.For example, the feature that is shown or is described as an embodiment's a part can be used in conjunction with another embodiment, to produce another embodiment.Therefore, expectation is to the present invention includes these modifications and modification in the scope that is included into claims and equivalent thereof.

Fig. 1 shows the conventional wind turbine 10 that constitutes.Wind turbine 10 comprises the pylon 12 that cabin 14 is mounted thereon.A plurality of turbine buckets 16 are installed on the rotor hub 18, and rotor hub 18 is connected on the main flange that makes the main rotor shaft rotation.The generating of wind turbine and control member are housed in the cabin 14.View among Fig. 1 only provides for the purpose of demonstration, so that the present invention is placed exemplary use field.What will be appreciated that is to the invention is not restricted to the wind turbine structure of any particular type.

Fig. 2 is the more detailed view of wind turbine blade 16.Blade 16 comprises top shell component 20 and bottom shell component 22.Top shell component 20 can be configured to the surface, suction side of blade 16, and bottom shell component 22 can be configured to the surface on the pressure side of blade.Blade 16 comprises leading edge 24 and trailing edge 26, and root portion 28 and tip part 30.As known in the art, top shell component 20 and bottom shell component 22 are being bound up along connecting thread 36 places of leading edge 24 and connecting thread 37 places at trailing edge 26 places.In the formation of these connecting

threads

36,37, the binding slurry 34 (Fig. 5) of flowable viscous form is applied between the cooperation laminating surface of top shell component 20 and bottom shell component 22 along the length of connecting thread 36,37.What will be appreciated that is that term " links slurry " here to be used with general meaning, so that be included in the tackiness agent of any kind that applies under the flowing state that just begins or link material.The binding slurry 34 of particular type is not relevant especially with the present invention, and the epoxides of any suitable type, compound or other material 34 all can adopt this.

Linking slurry 34 applies with the amount and the kenel (pattern) of abundance usually, so that form connecting thread width 37 at leading edge 24 places formation design connecting thread width 38 and at trailing edge 26 places, this guarantees at the connected surfaces area along minimum between the member of corresponding connecting

thread

36,37 length.For example, referring to Fig. 5, drawn the leading edge 24 of turbine bucket 26.Link slurry 34 and be applied between the relative cooperation laminating surface of top shell component 20 and bottom shell component 22, so that limit the linking department that has design link width 38 and link thickness 40.For the design standard of link width 38 and thickness 40 can based on as any design factor well known to those of ordinary skill in the art be combined between the dissimilar blades and change.For example, referring to Fig. 3, drawn different connecting thread width 37 at trailing edge 26 places of blade 16.

Once more referring to Fig. 5, the particular problem relevant with method with being used to apply the conventional system that links slurry 34 is, too much binding slurry is expressed into the internal cavity 25 (Fig. 3) between the matching surface of top shell component 20 and bottom shell component 22, and finally be cured as the mass block 35 of hardening (or solidifying), this mass block 35 adds to blade 16 with bigger weight.The binding slurry 35 of excessive quality can not increase structural integrity or other useful purpose of any degree to blade 16.In assembling process, the too much binding slurry 34 of part also can be extruded from seal clearance 46.But, this too much material was removed along the length of leading edge 24 or trailing edge 36 before it solidifies easily.

The situation of being drawn in Fig. 5, sealed member 32 is arranged between top shell component 20 and the bottom shell component 22 along connecting thread 36.The various embodiments of sealed member 32 draw in Fig. 4 and Fig. 6 to Figure 12, and will be described more fully below.Usually, as painting among Fig. 6, sealed member 32 has certain shape and structure, so that when in blade 16 assembling top shell component 20 and bottom shell component 22 being matched, prevents that too much flowed binding slurry 34 from flowing through sealed member 32 and enter in the internal cavity 25.In fact, sealed member 32 usefulness are opposed to flowing and are linked the dam of slurry 34, and therefore impel any too much binding slurry 34 to flow out between the

housing parts

20,22 via seal clearance 46, and wherein too much material is removed easily.

The expectation be, sealed member 32 along in leading edge 24 and the trailing edge 36 each and provide.Yet, comprise that sealed member 32 along the only connecting thread 36 at leading edge 24 or trailing edge 26 places is also in scope and spirit of the present invention.

Sealed member 32 can be by the suitable material of any kind or combination of materials and is formed.Sealed member 32 can see through air, links flowing of slurry 34 but can not see through to flow.In this way, can both pass sealed member 32 dissipations from any air of extruding between the matching surface of top shell component 20 and bottom shell component 22, flowable binding slurry 34 is extruded via seal clearance 46 simultaneously.

Drawn the specific embodiment of sealed member 32 among Fig. 4, wherein, sealed member 32 comprises being attached to and blocks parts 44 in top shell component 20 and the bottom shell component 22 each.Referring to Fig. 3, blocking parts 44 will be with design connecting thread width 38 location.Among the embodiment who is painted in Fig. 4, respectively block parts 44 and be brush type Sealing, wherein, the bristle of many relative tight spacings extends along the corresponding longitudinal length that blocks parts 44.Bristle is allowed that air passes and is blocked parts 44 accordingly, prevents to link slurry 34 simultaneously and flow through these parts.Brush seal can overlap, cooperatively interact as painting among Fig. 4 or differently engage with any alternate manner.

What will be appreciated that is, also can adopt the single parts 44 that block of brush seal form, and wherein, brush seal has certain structure makes one from

housing parts

20,22 to extend to

relative housing parts

22,20.

Fig. 7 shows the alternative of sealed member 32, wherein, provides a plurality of parts 44 and these of blocking to block parts 44 and cooperate each other.For example, be attached to and block parts 44 the blocking in the parts 44 on the laminated portion that is attached to top shell component 20 that cooperatively interact on the laminated portion of bottom shell component 22.In this specific embodiment 20, block parts 44 and can be brush seal, wherein, bristle can penetrate in the bristle of relative brush seal.In alternative, to block parts 44 and can be firm relatively parts, one of them blocks parts 44 and is defined for the relative notch that blocks parts 44 of reception or the receive path of other type.

Fig. 8 shows the another embodiment of sealed member 32, and wherein, the parts 44 that block in top shell component 20 and the bottom shell component 22 on each the laminated portion extend toward each other and overlap.Blocking parts 44 can contact with each other at the part place that overlaps, and maybe can be spaced apart from each other.Utilize this certain embodiments, block parts 44 and can be the bigger or more firm parts of rigidity, it is attached or otherwise directly and be formed in the

corresponding housing parts

20,22.

Fig. 9 shows the another alternative of sealed member 32, wherein, provides a plurality of isolated parts 44 that block.Block " complications " the path that parts 44 are defined for the binding slurry 34 that can flow.For example, referring to Fig. 9, what should recognize easily is, any flowable binding slurry 34 moves through serpentine pathway before all need be in being emitted to the internal cavity of blade.Term " complications " here is used to describe and has a plurality of directions and change so that suppress to link slurry 34 complete stream and cross any path that blocks parts 44.

Figure 10 and Figure 11 have drawn an embodiment, wherein, block parts 44 and be attached on the top shell component 20, for example be attached on the laminate surface 21 of inclination with certain position and orientation, so that when component groups is fitted together, the front end 23 by bottom shell component 22 as the arrow among Figure 10 is painted engages.Block parts 44 and can be the elasticity brush seal.Figure 11 shows with respect to top shell component 20 and moves to bottom shell component 22 on its assembling position.Block parts and engage (and can by these end 23 deflections), so that the gap basically between the plug members by the end 23 of bottom shell component 22.What expect is that it is flexible blocking parts 44, and the end 23 that keeps against bottom shell component 22.Flowable binding slurry 34 is infused between the

housing parts

20,22, so that the seal thickness and the width of expectation are provided.Simplify and convenience for the assembling that makes

housing parts

20,22, the embodiment among Figure 10 and Figure 11 may expect.

Figure 12 has drawn the top shell component 20 at trailing edge 26 places and the linking department between the bottom shell component 22.Drawn different connecting thread width 39 among the figure.Too much binding slurry 35 extends beyond arbitrary connecting thread width dimensions 39, and for mentioned above former thereby be problematic.

Figure 13 shows between top shell component 20 and bottom shell component 22 and to be the single sealed member 32 that blocks parts 44 forms in the trailing edge place.As indicated above, this blocks parts 44 and can be brush seal, firm and be the material of rigidity, or any other suitable type block material.The single parts 44 that block can extend towards relative housing parts from arbitrary housing parts 20,22.As appreciable among Figure 11, block the design size setting of parts 44, and prevent from internal cavity 25, to form too much binding material with connecting thread width 39.

Figure 14 shows the sealed member 32 at big connecting thread width 38 places.In this embodiment, Sealing 32 is limited by a plurality of parts 44 that block, and wherein, at least one blocks parts 44 each extension from top shell component 20 and bottom shell component 22.

What will be appreciated that is all can to adopt at connecting thread 37 places along the trailing edge linking department 26 among Figure 13 and Figure 14 above with reference to the described any embodiment of Fig. 7 to Figure 11.

Define the barriers that links in slurry 34 inflow blades 16 internal cavities 25 owing to block parts 44, so the present invention can provide following additional benefits, the viscosity that promptly links slurry 34 can increase or otherwise change to be guaranteed more fully to use and eliminate along air pocket or the space of connecting thread between housing parts, and does not worry that the bigger slurry of viscosity is with easier flowing in the cavity 25.

The present invention also comprises the wind turbine 10 (Fig. 1) that at least one blade 16 wherein is constructed with any structure of distinct advantages of the present invention as indicated above.

Although describe this theme in detail with reference to concrete exemplary embodiment and method thereof, those of ordinary skill in the art will obtain preamble when understanding, can be easily to these embodiments make improvements, modification and equivalent arrangements.Therefore, the scope of present disclosure is by way of example but not the mode by restriction, and as those of ordinary skill in the art will understand easily, present disclosure is not got rid of and is comprised these modifications, modification and/or install additional.

Claims

1. a wind turbine blade (16), described blade comprises:

Internal cavity (25) is defined in therebetween top shell component (20) and bottom shell component (22);

Described top shell component and described bottom shell component utilization link the connecting thread (36,37) that slurry (34) locates along the leading edge (24) and the trailing edge (26) of described blade and connect;

Sealed member (32), it is arranged between described top shell component and the described bottom shell component along at least one the design width (38,39) with described connecting thread in described trailing edge or the described leading edge;

The structure that described sealed member has makes when in the assembling at described blade described top shell component and described bottom shell component being matched, and prevents that too much flowed binding slurry from flowing through described sealed member and enter in the described internal cavity.

2. wind turbine blade according to claim 1 (16) is characterized in that, described wind turbine blade (16) comprises along each the described sealed member (32) in described leading edge (24) and the described trailing edge (26).

3. wind turbine blade according to claim 1 (16) is characterized in that, described sealed member (32) can see through air.

4. wind turbine blade according to claim 3 (16), it is characterized in that the brush seal (48) that described sealed member (32) comprises that of being attached in described top shell component (20) or the described bottom shell component (22) or both go up and extends towards relative corresponding described bottom shell component or top shell component.

5. wind turbine blade according to claim 3 (16), it is characterized in that, described sealed member (32) comprises and blocks parts (44) on each that is arranged in described bottom shell component (20) and described top shell component (22) that the described parts that block cooperatively interact.

6. wind turbine blade according to claim 3 (16), it is characterized in that, described sealed member (32) comprises and blocks parts (44) on each that is arranged in described bottom shell component (20) and described top shell component (22) that the described parts that block overlap.

7. wind turbine blade according to claim 3 (16) is characterized in that, described sealed member (32) comprises the single parts (44) that block.

8. wind turbine blade according to claim 3 (16) is characterized in that, described sealed member (32) comprises that being defined for to flow and link a plurality of staggered parts (44) that block of the zigzag channel of slurry (34).

9. wind turbine blade according to claim 1 (16), it is characterized in that, described wind turbine blade (16) also comprises and is positioned at the seal clearance (46) that the described leading edge (24) relative with described sealed member (32) or described trailing edge (26) are located, described seal clearance provides opening, too much flowed binding slurry flows out from described connecting thread (36,37) via described opening at the assembly process of described blade.

10. wind turbine blade according to claim 1 (16), it is characterized in that, described sealed member (32) comprises and blocks parts (44), the described parts (44) that block are with certain position and directed from described top shell component (20) extension, so that engaged and deflection by the front end (23) of described bottom shell component (22).

11. wind turbine blade according to claim 10 (16) is characterized in that, the described described front end (23) that blocks the described bottom shell component of parts (44) against (22).

12. a wind turbine (10), described wind turbine comprises a plurality of turbine buckets, and at least one described turbine bucket is according to claim 1 each described wind turbine blade to the claim 11.